Alright, let's work through 3105 times 5691 step by step
3105 × 5691 = 5691 × (3105)
+ 5691 × 5 yielding 28455
+ 5691 × 00 that results in 0
+ 5691 × 100 what gives us 569100
+ 5691 × 3000 giving us 17073000

= 17670555
